How to identify the relation between elements in JAXB - jaxb

Question

Is there intelligent way to identify relation between elements using JAXB.
For example: If element SMTP is referred/used in the element Notification and element Configuration
<element name="SMTP">
<complexType>
<sequence>
<element name="fromEmailAddress" type="string"/>
<element name="hostName" type="string"/>
<element name="portNumber" type="string"/>
</sequence>
</complexType>
</element>
<element name="Notification">
<complexType>
<sequence>
<element ref="tns:SMTP"/>
</sequence>
</complexType>
</element>
<element name="Configuration">
<complexType>
<sequence>
<element ref="tns:SMTP"/>
</sequence>
</complexType>
</element>
Is there way to identify this relation/dependancy(SMTP with Notification & Configuration) using JAXB(iam using JAXB to generate classes for the above elements present in my XSD).If it is, sample java code will be helpful
Thanks
Ravi

Answer 1

The Configuration and Notification classes will be generated with an SMTP property:
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
#XmlAccessorType(XmlAccessType.FIELD)
#XmlType(name = "", propOrder = {
"smtp"
})
#XmlRootElement(name = "Configuration")
public class Configuration {
#XmlElement(name = "SMTP", namespace = "urn:example", required = true)
protected SMTP smtp;
public SMTP getSMTP() {
return smtp;
}
public void setSMTP(SMTP value) {
this.smtp = value;
}
}
If you are looking to make this a bidirectional relationship you can leverage the #XmlInverseReference extension in EclipseLink JAXB (I'm the tech lead). For more information see:
http://bdoughan.blogspot.com/2010/07/jpa-entities-to-xml-bidirectional.html